March 21, 2019 — A research project by the Alaska Department of Fish and Game looking at chum and pink salmon runs in Southeast Alaska and Prince William Sound is expanding to help biologists understand the interplay between wild runs and hatchery strays. There is concern that hatchery fish could alter the genetics of wild populations, posing a threat to their survival.
Homer-based Fish and Game biologists Glenn Hollowell and Ted Otis started tracking hatchery fish found in wild streams around Kachemak Bay in 2014. That was around the time when Cook Inlet Aquaculture Association’s Tutka Bay Lagoon Hatchery reopened after several years.
They wanted to examine how well the hatchery pink salmon homed back to the Kachemak Bay facility, but they found something strange: salmon from other hatcheries.
“When we initially started doing this, we were not anticipating finding any Prince William Sound fish in our samples whatsoever. It was just not something we even considered,” Hollowell explained. “We were very surprised to find that a number of our streams had very significant, double-digit numbers (of Prince William Sound hatchery fish) in 2014.”
The Prince William Sound pinks keep showing up each year, and just the idea that hatchery pinks could stray so far has heated up a dispute over the potential harm on wild runs — namely, whether they could alter the genetics of wild populations in a way that would threaten their survival rate.